<template>
  <el-form ref="deptForm" :model="form" :rules="rules" label-width="120px">
    <el-form-item label="部门名称" prop="name">
      <el-input v-model="form.name" style="width:80%" placeholder="1-50个字符" />
    </el-form-item>
    <el-form-item label="部门编码" prop="code">
      <el-input v-model="form.code" style="width:80%" placeholder="1-50个字符" />
    </el-form-item>
    <el-form-item label="部门负责人" prop="manager">
      <el-select v-model="form.manager" style="width:80%" placeholder="请选择">
        <el-option v-for="item in list" :key="item.id" :value="item.username" :label="item.username" />
      </el-select>
    </el-form-item>
    <el-form-item label="部门介绍" prop="introduce">
      <el-input v-model="form.introduce" style="width:80%" placeholder="1-300个字符" type="textarea" :rows="3" />
    </el-form-item>
    <el-form-item>
      <el-button type="primary" size="small" @click="hSubmit">确定</el-button>
      <el-button size="small" @click="hCancel">取消</el-button>
    </el-form-item>
  </el-form>
</template>
<script>
import { getEmployeesSimple, addDepartments,
  getDepartmentsDetail, editDepartments } from '@/api/departments'
export default {
  props: {
    id: {
      type: String,
      required: true
    },
    isEdit: {
      type: Boolean,
      required: true
    },
    originList: {
      type: Array,
      required: true
    }
  },
  data() {
    const existCodeValid = (rule, value, callback) => {
      let existCodeList = this.originList.map(item => item.code)
      // 确定是否是编辑的状态
      if (this.isEdit) {
        // 根据id将当前编辑的部门id从所有的部门中移除
        existCodeList = this.originList.filter(item => item.id !== this.id).map(item => item.code)
      }
      // console.log(existCodeList, 'existCodeList')
      if (existCodeList.includes(value)) {
        // 存在，校验失败
        callback(new Error(`部门编码${value}已存在`))
      } else {
        // 不存在，放行，callback()
        callback()
      }
    }
    const existNameValid = (rule, value, callback) => {
      // console.log(this.originList)
      let existNameList = this.originList.filter(item => item.pid === this.id).map(item => item.name)
      // console.log(existNameList, 'existNameList')
      // 确定是否是编辑状态
      if (this.isEdit) {
        const pid = this.originList.find(item => item.id === this.id).pid
        const brothers = this.originList.filter(item => item.pid === pid)
        existNameList = brothers.filter(item => item.id !== this.id).map(item => item.name)
      }
      if (existNameList.includes(value)) {
        callback(new Error(`部门名称:${value}已存在`))
      } else {
        callback()
      }
    }
    return {
      form: {
        name: '', // 部门名称
        code: '', // 部门编码
        manager: '', // 部门管理者
        introduce: '' // 部门介绍
      },
      rules: {
        name: [
          { required: true, message: '请输入部门名称', trigger: 'blur' },
          { min: 1, max: 50, message: '请输入长度是1~50位的部门名称', trigger: 'blur' },
          { validator: existNameValid, trigger: 'blur' }
        ],
        code: [
          { required: true, message: '请输入部门编码', trigger: 'blur' },
          { min: 1, max: 50, message: '请输入长度是1~50位的部门编码', trigger: 'blur' },
          { validator: existCodeValid, trigger: 'blur' }
        ],
        manager: [
          { required: true, message: '请输入部门管理者', trigger: ['blur', 'change'] }
        ],
        introduce: [
          { required: true, message: '请输入部门介绍', trigger: 'blur' },
          { min: 1, max: 300, message: '请输入长度是1~300位的部门介绍', trigger: 'blur' }
        ]
      },
      list: [] // 保存的是部门负责人
    }
  },
  // 解决方案3，使用侦听器watch来解决数据不更新
  // watch: {
  // id: function(new_val, old_val) {
  //   console.log(new_val, 'new_val')
  //   console.log(old_val, 'old_val')
  //   this.loadDepartmentsDetail()
  // }
  // id: {
  //    开启深度侦听
  //    deep:true,
  //   // 立即加载
  //   immediate: true,
  //   handler: function(new_val, old_val) {
  //     console.log(new_val, 'new_val')
  //     console.log(old_val, 'old_val')
  //     this.loadDepartmentsDetail()
  //   }
  // }
  // },
  created() {
    this.loadEmployeesSimple()
    // 如果是编辑部门，才有需要获取部门详情数据进行回填
    if (this.isEdit) {
      this.loadDepartmentsDetail()
    }
  },
  methods: {
    // 清空表单
    resetForm() {
      this.$refs.deptForm.resetFields()
      // console.log(this.form, '清空表单')
    },
    // 加载部门详情数据
    async loadDepartmentsDetail() {
      try {
        const res = await getDepartmentsDetail(this.id)
        // console.log(res, 'getDepartmentsDetail')
        // 添加获取到的数据填充到表单
        this.form = res.data
        // console.log(this.form, 123)
      } catch (error) {
        console.log(error)
      }
    },
    async loadEmployeesSimple() {
      try {
        const res = await getEmployeesSimple()
        // console.log(res.data, 'getEmployeesSimple')
        this.list = res.data
        // console.log(this.list)
      } catch (error) {
        console.log(error)
      }
    },
    // 实现新增子部门
    async doAdd() {
      // console.log('新增子部门')
      try {
        const res = await addDepartments({ ...this.form, pid: this.id })
        console.log(res, '新增子部门')
        this.$emit('success')
      } catch (error) {
        console.log(error)
      }
    },
    async doEdit() {
      // 实现编辑部门功能
      // console.log('编辑部门')
      try {
        const res = await editDepartments(this.form)
        console.log(res, 'editDepartments')
        this.$emit('success')
      } catch (error) {
        console.log(error)
      }
    },
    // 确定
    hSubmit() {
      this.$refs.deptForm.validate((valid) => {
        if (!valid) return
        // console.log(this.isEdit, '123')
        this.isEdit ? this.doEdit() : this.doAdd()
      })
    },
    // 取消
    hCancel() {
      // 通知父组件去关闭弹层
      this.$emit('close')
    }
  }
}
</script>
